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How to Fix QuickBooks Error code -6123, 0

  • Posted by: QB
Error -6123, 0 when upgrading or opening company file - Pro Accountant Advisor

Simple Tips to Fix QuickBooks Error -6123, 0

QuickBooks is an innovative accounting software made by Intuit and used and by millions of small and mid-sized businesses around the world. It undoubtedly makes the task of managing a business incredibly simple. Though, like any other software in the world, QuickBooks too receives errors and glitches at times. While some messages can be fixed by simply following the instructions offered by the software, some may be intricate and unintelligible. QuickBooks Error code -6123, 0 is one such error. There might be multiple reasons for this error to occur.


When establishing or when the use of a QuickBooks company report over a network, you see one or more of the following errors:


The image as shown below is similar which appears on your desktop.

QuickBooks Error Message 6123, 0

Reasons for the occurrence of QuickBooks Error Code -6123, 0

This error is mostly caused by one or more of the given reasons:

  • The main computer has a corrupt network connection.
  • Firewall network is blocking a port needed to communicate with the server hosting the company file.
  • Damaged QBW files.
  • Corrupt QuickBooks data or program files.
  • Your system has multiple QuickBooks database services running.
  • The privacy service of McAfee antivirus is installed with the Block Web Bugs filter option selected that is conflicting with QB Desktop.
  • Same company file is open in a new version of QuickBooks.
  • You are restoring a backup from a flash drive or from a removable storage device.
  • Damaged Window user.


Steps to Fix QuickBooks Error Code -6123, 0

QuickBooks Error Code -6123, 0 is an intricate issue. However, you can use the following solutions to get rid of it.


Solution #1 – Use QuickBooks File Doctor tool

QuickBooks File Doctor is an excellent tool to fix some of the most common causes that trigger QuickBooks errors. You can download this handy tool for Intuit’s official website. After QuickBooks File Doctor is downloaded, install it and run on your system. It may present you the possible damages in data or file that may be causing the QB error.  You will have two options to fix the damages shown in the result you received after running the tool:


✔ Solution #2 – Install and run the QuickBooks Connection Diagnostic Tool

On your host (main) computer, check my network connection. Install and run the QuickBooks Connection Diagnostic Tool. Move to the next solution if the above mentioned solutions don’t work.


✔ Solution #3 

If the QuickBooks Error Code -6123, 0 still exists after trying solution 1 and 2, follow the following steps to fix the network data file.

  • Press the Windows key (Start button) and click Explore.
  • Check your Company file and right click the file with .ND extension.
  • Rename it to .ndold.

Important: If you still fail to fix the network data file QuickBooks Error -6123, 0, you will also not be able to switch to multiple user mode. To switch to multiple user mode you can do the following:


  • Go to File.
  • Select Utilities.
  • Host multi-user access.


QuickBooks Error Code 6123


  •  Go to File>Switch to Multi-user mode


QuickBooks-Multi-user-Mode (Error 6123)


Important: If the company file cannot be opened by any chance, ‘Switch to multi-user mode’ option will not be available.  In that case, go to File>Utilities>Host multi-user access.


We hope that this article will assist you with everything you should know about QuickBooks Error Code -6123, 0. You can try the solutions mentioned on this page and fix the error if it pops up on your screen. If you still have any trouble, or you face any other QuickBooks related issue, you can contact our 24*7 QuickBooks Error Support Number, and our QuickBooks Support Team will be glad to offer you quick and precise solutions.



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How to Fix QuickBooks Error code -6123, 0

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